Piston



July 7, 1925. 1,545,450

H. W. PIERCE PISTON Filed Feb. 25. 1925 TTURNEYS Patented July 7, l192.55..

UNITED STATES PATENT oFF-ics.

HOWARD WILLIAM PIERCE, OF BUTTE,` MONTANA.

PIs'roN. f

Application led February 23, 1923; Serial No. 62(1),826.

To voai/'Z whom t may concern: i

Be it known that-I, HOWARD WILLIAM PIERCE, a citizen of the `United States, and Ia resident of Butte, in the county of Silver Bow and State of Montana, have invented new and useful Improvements in Pistons, of which the following isafull, clear, and exact description.

This invention relates to pistons, primarily designed for'use in internal combustion engines, but also suitable in any ldevice requiring a reciprocating piston.y

Usually in the use oi' reciprocating pistons it is found that one side of the piston carries a greater load than the other and consequently suffers from greater Wear. When a piston becomes worn on. one slide there develops what is known as piston slap, which gives rise to a considerable Wear of the cylinder. In some cases the piston slap may become so great that it is annoying to the operator ot' the engine or other device.

The general object of this invention is the provision of a simple and durable piston constructed with a detachable side wall,

adjustably mounted on the body of the iston so that the piston may vbe"adjuste to any desired diameter 4either at the original setting up of the piston or after it has been partially wornu This object is accomplished b constructing the piston with a detachab e side wall section, forming integral with the body of the piston section, and providing means for attaching the side wall section in different relative positions on said lug.

These and other objects of the invention will be more clearly understood from the followin detailed descriptionand accompanying ldrawings."` l

Figure' 1 is a vertical section through the piston along the line 1--1, Figure 2, showing the piston construction; i

Figure 2 is a horizontal section of the Apiston showing certain members spaced apart in order to s how their construction'.

Referring to the above-mentioned drawings, the invention includes a hollow body portion l0 formed with a plurality of webs 11, supporting a lug 12 extending transversely of the bod portion. The head 14 of' the lug 12 is ho low, as shown in F i re 1, and curved to conform to the. wall o the piston. Elongated openings 18 extending in the line of the diameter of the piston is like.

a lug for supporting the side wall formedin lthe head 14. section 15 of the (side. wall of the piston is madedetachable and hasitvvoI webs 16 and, 17 formed therein and spaced apart so that they will tit over the head ofthelug 1 2. Openings 18 and 19 are provided in the webs 16 and 17, respectively, and are so positioned that they aline with the elongated openin 13 in the head of" the lug when the detached section 15 of the side wall is placed in position. The opening '18 is provided with an internal thread for kreceiving a bolt 2O which is projected through the openings in the lug and webs 16 and 17. This bolt serves tov reta-in the section 15 of the side wall in position, completing the body 4of the piston. In order to fix the bolt 20st) as to' prevent it Working loose, an opening 21 is provided in 'the bolt for receiving a Cotter pin or the When the section 15 does not rest against the curved end of .the lug 12, ay shim 22 is providedifor rigidly fixing the wall of the section 15 in the desired .position relative to the body ci the piston 10. These shi'ins are usually made of bronze or some suitable material and may be constructed `of any desired thickness, so that the section 15 may be spaced in any desired position relative to the body of the piston.-

As shown in Figure 1., the head ofthe piston is of usual construction, A plurality of circumferential grooves 23 are formed in Ithe piston head for receiving the piston rings. body. of the piston for receiving the wrist in 25. P: In using a piston of this type after the ,piston has become artially worn the sec- An opening 24 projects through the tion 15 may be setre ative to the body of theV piston so as togive the original diameter. In order to tix the section 15 oi' thcside wall 'inthe desired position a' shim 22 of proper .thickness may be mounted between the head of the lug 12 and the section of the side-wall. Such a construction is of value in that there is room for expansion due to heat without p y great distortion of the piston. In constructing pistons of this type it is possible to make the portion of the piston which is subject to V y sides due to the thrust of the connecting rod.l

constructed with two removable sections 15 located opposite one another. Such a construction would take care of Wear on both illnstratedfexample constitutes a practical embodiment of my' invention I do not limit myself strictly to the exact details herein illustrated since manifestly Vthe same can be considerably varied Without departing from the spirit of the invention as defined in the appended claims.

Claims..

1. A piston comprising a hollow body having one side cut away and provided with a transverse lng in said cut away portioin said lug having a hollow head and provided with alined elongated openings, a removable section having spaced and recessed Webs provided vvith openings, said section fitting in the cutaway portion of the piston with its webs engaging the top and bottom of the lug, and a bolt passing through theopenings of the head of the lug and the Webs of the section.

2. A piston comprising a body having one side recessed and provided with a transverse lug in said recess, said lug beinglprovided with ahead having alined slots therein, aA

removable section having spaced and recessed Webs provided with openin s, one of which is screw threaded, and a bo t extending through the yunthreaded opening of one of the webs, the slots of the head, and screwing into the threaded opening of the other web of the section. y

3. A piston comprising a body having one side recessed and provided with a transverse lug in said recess, said lug having a head provided with alined slots, a removable section having spaced Webs engaging the top and bottom of the head of the lug and each provided with an opening, a shim between the head of the lug and section, and a bolt passing through the openings of the web and the slots of the head of the lug.

4..V A piston of the character described, comprising a body having one side cut away and provided With a member extending into the cnt away portion intermediate its ends, a removable section closing the cut away portion and provided on its inner face with inwardly projecting members engaging the member of the body, and means for adjustably securing the members of the section to the member of the body.

HOWARD WILLIAM PIERCE. 

